Stalking Electrons in Demanding Environments
نویسنده
چکیده
The BRC has a complex electronic excited state, P*, that evolves into subsequent products P+Hand P+B-. Pump-dump-probe spectroscopy on the wild type BRC and on YM210W, a mutant with a stabilized, long lived P* excited state, has uncovered a new charge-separated state in both BRC’s. When P* is dumped, a fraction of its population is transferred to this state that has a strong Stark shift in the accessory bacteriochlorophyll (BM) region which serves as a signature for P + and a lifetime highly comparable to the slow phase of P* decay. This lead us propose this intermediate to be P+/P-. This chapter is based on the publication “Multipulse spectroscopy on the wild-type and on mutant bacterial reaction centre uncovers a new intermediate state in the special pair excited state”, Thomas A. Cohen Stuart, I.H.M. van Stokkum, R. van Grondelle, Chemical Review Letters 474 (2009), 352-356
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